Rotary toothbrush



J. GOLDSTEIN.

ROTARY TOOTHBRUSH.

APPLICATION FILED 1AN.2r,1919.

1 3 30, 5 25 Patented Feb. 10, 1920.

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brushes.

UNITED STATES PATENT OFFICE.

JACOB GOLDSTEIN, OF WEST HAZLE'ION, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JAMES J'. MUNLEY, OF WEST HyKZLETON, PENNSYLVANIA.

ROTARY TOOTHIBRUSH.

Specification of Letters Patent. I Patented Feb. 10, 19 20.

Application filed January 27, 1919. Serial No. 273,378.

To all whom; it may concern:

Be it known that I, JAooB Gonosrnm, a

citizen of the United States /'residing at the several views, the frame 1 comprises a West Hazleton, in the comity of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Rotary Toothbrushes, of which the follow-. ingi is a specification.

his invention relates to tooth brushes and more particularly to rotary tooth The primary object of the invention is to provide rotary brush elements arranged in parallel relation and-adapted to be rotated in opposite directions whereb both surfaces of the teeth may be cleane by the brush elements.

The invention further aims to provide brush elements adapted to be actuated in opposite directions and spaced apart sufficiently to permit the brush elements to be thrust into the users mouth whereby the brushes may be engaged on opposite sides of either the upper or lower row of teeth while the shafts are manually actuated to cause rotation of the 'brush elements in opposite directions. 7

Another dbject of the invention is to provide arotary tooth brush having parallel rotary brush elements and shields embracing portions of the brush elements whereby the inside of the users mouth will not be injured or irritated, and also to effectively prevent the projection of saliva fromthe mouth while the brushes are rapidly rotated. I

The above and additional objects are accomplished by such means as are illustrated in the preferred embodiment and in the accompanying drawings, wherein like characters of reference denote like or corresponding parts throughout the several'views:

Figure 1 is a perspective view of the device constructed in accordance with my in vention.

Fig. 2is a plan view of the same, parts being shown in section.

- Fig. 3 is a section taken on the line 3--3' of Fig. 2, and

Fig. 4 is an end elevation,

Fig. 5 is a fragmentary plan view, partly in section, illustrating a modified form of the invention, and

Fig. 6 is a detail view of the same.

Referring to the drawing, wherein is illusconstructed in any trated the preferred form of my invention,

in which like numerals of reference indicate plate 2 having its longitudinal marginal edges rolled to provide sleeves 3 in parallel relation.

One end of the plate between the sleeve 3 is removed to provide a relatively long open space 4. Attached to the opposite end of the frame is a gear housing 5 within which the gears 6 are arranged. The sleeves 3 contain the parallel shafts 7 which extend into the housing 5 and carry the gears 6. One end of one shaft is extended as indicated at 8 and' ,is shaped to provide a crank 9 which may be manually actuated in order to rotate the shaft whereby both shafts will be simultaneously actuated in opposite directions by virtue of the intermeshing gears 6.

At the opposite ends of the sleeves, the shafts are extended and have mounted on the extended portions, the brush elements 10 preferred manner and preferably consisting of'stifi' bristles such as are employed in the construction of tooth brushes. It will be noted that the brush elements 10 are relatively small in diameter andv it will beobvious that they may be of any preferred length. The shafts are dis posed close enough together to cause the brush elements to be maintained in close proximity so that the teeth when received between the brushes will be thoroughly cleansed when the brushes are actuated.

The elongated space 4 between the ex tended ends of the sleeves 3, will permit the rotary brushes to be extended into either side of the mouth, the teeth being received between the brush elements as the device is manipulated by the operator. It will be noted, therefore that both the front and back surfaces of the teeth will be thoroughly cleansed and the crank may be rotated in integral part of an extension 14 formed at the end of each sleeve. This extension is bent at right angles outwardly from the sleeve as shown so that when the shield is in position it partially embraces the outer portion of the brush element.

Therefore when the device is placed within the users mouth, the shield will engage the check n the inside thereof. While the device is in use on the front teeth, the shield will serve to prevent projection of saliva from the mouth during the rapid rotation of the brushes.

The foregoing description and accompanying drawings have reference to What might be considered to be the approved or preferred form of my invention. I desire it to be understood that I may make such changes in the construction, combination and arrangement of parts, materials dimensions, etcetera as may prove expedient and fall within the scope of the appended claims.

Having thus fully described my invention What I claim as new and desire to secure by Letters Patent is 1. A rotary tooth brush of the class described comprising a frame, said frame provided with a web plate, sleeves integrally mounted upon the marginal edges of said plate, a relatively long open space provided at the ends of said sleeve, shafts mounted within said sleeves, means mounted on the ends of said shafts to rotate the latter in opposite directions, and rotary tooth brush elements mounted on the opposite ends of said shafts.

-2. A rotary tooth brush of the class described comprising a. frame, said frame provided with parallel sleeves held in spaced relation by a web plate integrally connected thercbetWeen, a relatively long open. space provided at one end of said sleeve, said Web plate adapted to extend beyond the other end of said sleeve and to be bent at right angles, shafts mounted Within said sleeves, gears carried by one end of said shafts, said gears adapted to mesh and to be manually operated by a crank, a housing provided around said gears and integral with the right angular portion. of said Web plate and rotary tooth brush elements mounted on the op osite end of said shafts.

n testimony whereof I aflix my signature.

JACOB GOLDSTEIN. 

